Brother, I have not owned a Baleno, ever which is why I can't get you ideas about rates but you can try Kiyani Autos on 051 5536221 for new parts.
For used / Kabli. visiting Gawalmandi and Ahata Mithoo as well as Chah Sultan is your only option.
I's suggest that you either take a motorbike or Careem to get there. Taking your own car if you can manage it, can be hectic.